Application of Reynolds Stress Modeling to Engine Flow Calculations

Autor:	L. Lebrère, Lionel Le Penven, B. Dillies, Marc Buffat
Rok vydání:	1996
Předmět:	Physics::Fluid Dynamics Physics Flow velocity K-epsilon turbulence model Turbulence Mechanical Engineering Turbulence modeling Reynolds stress equation model Reynolds stress K-omega turbulence model Mechanics Open-channel flow
Zdroj:	Journal of Fluids Engineering. 118:710-721
ISSN:	1528-901X 0098-2202
DOI:	10.1115/1.2835500
Popis:	To improve the prediction of turbulence inside internal combustion engines, a Reynolds stress turbulence model is implemented in the Kiva-II code. After a rapid description of the Launder-Reece-Rodi model (noted LRR), two validation test cases (the plane channel flow and the flow over a backward facing step) are presented. The advantages of a second order closure and the shortcomings of the LRR model are then analyzed. Finally, a simulation of an intake and compression stroke using both the standard k – ε model and the LRR model is described. As a precise knowledge of the velocity and turbulent fields near TDC is necessary for the prediction of the mixing and the combustion processes, we have analyzed the influence of the turbulence model on the flow field. Results are compared with experimental data and show a strong influence of the turbulence model even on the mean flow, especially at the end of the compression stroke (TDC).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4f35010450ccb634e51d7c9bc57a0cae https://doi.org/10.1115/1.2835500 Zobrazit plný text záznamu